当前位置: X-MOL 学术Phys. Dark Universe › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Einstein–Gauss–Bonnet gravity: Is it compatible with modern cosmology?
Physics of the Dark Universe ( IF 5.5 ) Pub Date : 2021-03-06 , DOI: 10.1016/j.dark.2021.100799
Miguel A. García-Aspeitia , A. Hernández-Almada

Einstein–Gauss–Bonnet (EGB) model is recently restudied in order to analyze new consequences in gravitation, modifying appropriately the Einstein–Hilbert action. The consequences in EGB cosmology are mainly geometric, with higher order values in the Hubble parameter. In this vein this paper is devoted to contribute with extra evidences about its pros and cons of the model from a cosmological point of view. We start constraining the characteristic parameter, α, of the EGB model when a cosmological constant as the catalyst for the acceleration is considered. The constrictions are developed at the background cosmology using Observational Hubble Data, Baryon Acoustic Oscillations, Supernovas of the Ia type, Strong Lensing Systems and the recent compilation of HII Galaxies. Additionally, we implement a statefinder analysis where we found not only a late acceleration but also an early Universe acceleration which is associated with the parameter α. Based on our results of the lensing systems, the Universe evolution never reaches a non accelerated phase, instead it is always presented in an accelerated state, being a possible fault that afflicts the EGB model.



中文翻译:

爱因斯坦-高斯-邦尼特引力:它与现代宇宙论兼容吗?

为了重新分析引力的新结果,适当修改了爱因斯坦-希尔伯特的作用,最近对爱因斯坦-高斯-引擎盖(EGB)模型进行了重新研究。EGB宇宙学的后果主要是几何学,在哈勃参数中具有较高的阶次值。因此,本文从宇宙学的角度致力于为模型的优缺点提供更多证据。我们开始限制特征参数,α当考虑宇宙常数作为加速的催化剂时,则为EGB模型的。使用观测哈勃数据,重子声振荡,Ia型超新星,强透镜系统和HII星系的最新汇编,在背景宇宙学中发现了这些收缩。此外,我们执行了状态查找器分析,不仅发现了较晚的加速度,而且还发现了与参数相关的较早的Universe加速度。α。根据透镜系统的结果,宇宙演化永远不会达到非加速阶段,而是始终以加速状态呈现,这是困扰EGB模型的可能故障。

更新日期:2021-03-12
down
wechat
bug